shell bypass 403
# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
# For details: https://bitbucket.org/ned/coveragepy/src/default/NOTICE.txt
"""Miscellaneous stuff for coverage.py."""
import errno
import hashlib
import inspect
import locale
import os
import sys
import types
from coverage import env
from coverage.backward import string_class, to_bytes, unicode_class
ISOLATED_MODULES = {}
def isolate_module(mod):
"""Copy a module so that we are isolated from aggressive mocking.
If a test suite mocks os.path.exists (for example), and then we need to use
it during the test, everything will get tangled up if we use their mock.
Making a copy of the module when we import it will isolate coverage.py from
those complications.
"""
if mod not in ISOLATED_MODULES:
new_mod = types.ModuleType(mod.__name__)
ISOLATED_MODULES[mod] = new_mod
for name in dir(mod):
value = getattr(mod, name)
if isinstance(value, types.ModuleType):
value = isolate_module(value)
setattr(new_mod, name, value)
return ISOLATED_MODULES[mod]
os = isolate_module(os)
# Use PyContracts for assertion testing on parameters and returns, but only if
# we are running our own test suite.
if env.TESTING:
from contracts import contract # pylint: disable=unused-import
from contracts import new_contract as raw_new_contract
def new_contract(*args, **kwargs):
"""A proxy for contracts.new_contract that doesn't mind happening twice."""
try:
return raw_new_contract(*args, **kwargs)
except ValueError:
# During meta-coverage, this module is imported twice, and
# PyContracts doesn't like redefining contracts. It's OK.
pass
# Define contract words that PyContract doesn't have.
new_contract('bytes', lambda v: isinstance(v, bytes))
if env.PY3:
new_contract('unicode', lambda v: isinstance(v, unicode_class))
else: # pragma: not covered
# We aren't using real PyContracts, so just define a no-op decorator as a
# stunt double.
def contract(**unused):
"""Dummy no-op implementation of `contract`."""
return lambda func: func
def new_contract(*args_unused, **kwargs_unused):
"""Dummy no-op implementation of `new_contract`."""
pass
def nice_pair(pair):
"""Make a nice string representation of a pair of numbers.
If the numbers are equal, just return the number, otherwise return the pair
with a dash between them, indicating the range.
"""
start, end = pair
if start == end:
return "%d" % start
else:
return "%d-%d" % (start, end)
def format_lines(statements, lines):
"""Nicely format a list of line numbers.
Format a list of line numbers for printing by coalescing groups of lines as
long as the lines represent consecutive statements. This will coalesce
even if there are gaps between statements.
For example, if `statements` is [1,2,3,4,5,10,11,12,13,14] and
`lines` is [1,2,5,10,11,13,14] then the result will be "1-2, 5-11, 13-14".
"""
pairs = []
i = 0
j = 0
start = None
statements = sorted(statements)
lines = sorted(lines)
while i < len(statements) and j < len(lines):
if statements[i] == lines[j]:
if start is None:
start = lines[j]
end = lines[j]
j += 1
elif start:
pairs.append((start, end))
start = None
i += 1
if start:
pairs.append((start, end))
ret = ', '.join(map(nice_pair, pairs))
return ret
def expensive(fn):
"""A decorator to indicate that a method shouldn't be called more than once.
Normally, this does nothing. During testing, this raises an exception if
called more than once.
"""
if env.TESTING:
attr = "_once_" + fn.__name__
def _wrapped(self):
"""Inner function that checks the cache."""
if hasattr(self, attr):
raise Exception("Shouldn't have called %s more than once" % fn.__name__)
setattr(self, attr, True)
return fn(self)
return _wrapped
else:
return fn
def bool_or_none(b):
"""Return bool(b), but preserve None."""
if b is None:
return None
else:
return bool(b)
def join_regex(regexes):
"""Combine a list of regexes into one that matches any of them."""
return "|".join("(?:%s)" % r for r in regexes)
def file_be_gone(path):
"""Remove a file, and don't get annoyed if it doesn't exist."""
try:
os.remove(path)
except OSError as e:
if e.errno != errno.ENOENT:
raise
def output_encoding(outfile=None):
"""Determine the encoding to use for output written to `outfile` or stdout."""
if outfile is None:
outfile = sys.stdout
encoding = (
getattr(outfile, "encoding", None) or
getattr(sys.__stdout__, "encoding", None) or
locale.getpreferredencoding()
)
return encoding
class Hasher(object):
"""Hashes Python data into md5."""
def __init__(self):
self.md5 = hashlib.md5()
def update(self, v):
"""Add `v` to the hash, recursively if needed."""
self.md5.update(to_bytes(str(type(v))))
if isinstance(v, string_class):
self.md5.update(to_bytes(v))
elif isinstance(v, bytes):
self.md5.update(v)
elif v is None:
pass
elif isinstance(v, (int, float)):
self.md5.update(to_bytes(str(v)))
elif isinstance(v, (tuple, list)):
for e in v:
self.update(e)
elif isinstance(v, dict):
keys = v.keys()
for k in sorted(keys):
self.update(k)
self.update(v[k])
else:
for k in dir(v):
if k.startswith('__'):
continue
a = getattr(v, k)
if inspect.isroutine(a):
continue
self.update(k)
self.update(a)
def hexdigest(self):
"""Retrieve the hex digest of the hash."""
return self.md5.hexdigest()
def _needs_to_implement(that, func_name):
"""Helper to raise NotImplementedError in interface stubs."""
if hasattr(that, "_coverage_plugin_name"):
thing = "Plugin"
name = that._coverage_plugin_name
else:
thing = "Class"
klass = that.__class__
name = "{klass.__module__}.{klass.__name__}".format(klass=klass)
raise NotImplementedError(
"{thing} {name!r} needs to implement {func_name}()".format(
thing=thing, name=name, func_name=func_name
)
)
class SimpleRepr(object):
"""A mixin implementing a simple __repr__."""
def __repr__(self):
return "<{klass} @{id:x} {attrs}>".format(
klass=self.__class__.__name__,
id=id(self) & 0xFFFFFF,
attrs=" ".join("{}={!r}".format(k, v) for k, v in self.__dict__.items()),
)
class CoverageException(Exception):
"""An exception specific to coverage.py."""
pass
class NoSource(CoverageException):
"""We couldn't find the source for a module."""
pass
class NoCode(NoSource):
"""We couldn't find any code at all."""
pass
class NotPython(CoverageException):
"""A source file turned out not to be parsable Python."""
pass
class ExceptionDuringRun(CoverageException):
"""An exception happened while running customer code.
Construct it with three arguments, the values from `sys.exc_info`.
"""
pass